PID Single Chemical

Single Chemical Mixtures

• Identify the chemical
• Set the PID Correction Factor to that chemical
• Find the Exposure Limit(s) for the chemical
• Set the PID alarms according to the exposure limits

CF Example: Toluene

• Toluene CF with 10.6eV lamp is 0.5; so PID is very sensitive to Toluene
• If PID reads 100 ppm of isobutylene units in a Toluene atmosphere
• Then the actual concentration is 50 ppm Toluene units

0.5_CF x 100 ppm_iso = 50 ppm_toluene

CF Example: Ammonia

• Ammonia CF with 10.6eV lamp = 11.2; so PID less sensitive to Ammonia
• If PID reads 10 ppm of isobutylene units in an Ammonia atmosphere
• Then the actual concentration is 112 ppm Ammonia units

11.2_CF x 10 ppm_iso = 112 ppm_toluene